Press-fit terminal and connector device

Patent metadata

Field	Value
Publication number	US-12482963-B2
Application number	US-202118027546-A
Country	US
Kind code	B2
Filing date	Aug 3, 2021
Priority date	Oct 7, 2020
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

A press-fit terminal is provided with a press-fit portion including two contact pieces facing each other across an eye hole. Each of the two contact pieces includes a parallel portion in parallel to that of the other contact piece, a front spring portion and a rear spring portion. A thickness of the press-fit portion is 0.75 mm or more and 0.85 mm or less. When G 1 [mm 3 ] and G 2 [mm 3 ] denote cross-sectional secondary moment of area per unit length of the front spring portion and cross-sectional secondary moment of area per unit length of the rear spring portion for the press-fit portion, G 1 +G 2 is 0.030 or more and 0.080 or less. Further, when θ denotes a gradient of the front spring portion with respect to an inserting direction of the press-fit portion, G 1 tan θ is 0.0024 or more and 0.0070 or less.

First claim

What is claimed is:

1 . A press-fit terminal to be press-fit into a through hole formed in a board, comprising:
a press-fit portion including two contact pieces facing each other across an eye hole, each of the two contact pieces including a parallel portion in parallel to that of the other contact piece, a front spring portion extending from the parallel portion in an inserting direction of the press-fit portion and a rear spring portion extending from the parallel portion in a direction opposite to the inserting direction of the press-fit portion, a thickness of the press-fit portion being 0.75 mm or more and 0.85 mm or less, when G 1 [mm 3 ] and G 2 [mm 3 ] denote a cross-sectional secondary moment of area per unit length of the front spring portion and a cross-sectional secondary moment of area per unit length of the rear spring portion calculated under the following conditions for the press-fit portion, respectively, G 1 +G 2 being 0.030 or more and 0.080 or less, and when θ denotes a gradient of the front spring portion with respect to the inserting direction of the press-fit portion, G 1 tan θ being 0.0024 or more and 0.0070 or less, [conditions]
the inserting direction of the press-fit terminal being a forward direction and the direction opposite to the inserting direction being a rearward direction,
a position of 0.1 mm from and behind a rear end of the eye hole being a front reference and a position of 0.1 mm from and in front of a rear end of the eye hole being a rear reference,
a plane perpendicular to an outer edge of the front spring portion from an inner edge of the front spring portion at the front reference being a front reference plane and a cross-sectional secondary moment of the front spring portion in the front reference plane being denoted by I 1 [mm 4 ],
a plane perpendicular to an outer edge of the rear spring portion from an inner edge of the rear spring portion at the rear reference being a rear reference plane and a cross-sectional secondary moment of the rear spring portion in the rear reference plane being denoted by I 2 [mm 4 ],
a length in the inserting direction of the press-fit portion from an intersection of a straight line extending in a direction perpendicular to the front reference plane from an intersection of the front reference plane and the outer edge of the front spring portion and a straight line extending along an outer edge of the parallel portion to the front end of the eye hole being denoted by L 1 [mm],
a length in the inserting direction of the press-fit portion from an intersection of a straight line extending in a direction perpendicular to the rear reference plane from an intersection of the rear reference plane and the outer edge of the rear spring portion and a straight line extending along the outer edge of the parallel portion to the rear end of the eye hole being denoted by L 2 [mm], and
the cross-sectional secondary moment of area per unit length of the front spring portion G 1 being I 1 /L 1 [mm 3 ] and the cross-sectional secondary moment of area per unit length of the rear spring portion G 2 being I 2 /L 2 [mm 3 ].

2 . The press-fit terminal according to claim 1 , wherein:
G 1 +G 2 is 0.030 or more and 0.060 or less, and G 1 tan θ is 0.0028 or more and 0.0060 or less.

3 . The press-fit terminal according to claim 1 , wherein a thickness of the press-fit portion is 0.8 mm.

4 . The press-fit terminal according to claim 1 , wherein:
the outer edge of the front spring portion is inclined inward in a width direction of the press-fit portion toward front, and the outer edge of the rear spring portion is inclined inward in the width direction of the press-fit portion toward rear.

5 . The press-fit terminal according to claim 1 , wherein an outward facing part of the parallel portion is formed into an arcuate shape when viewed along the inserting direction.

6 . A connector device, comprising:
a connector including the press-fit terminal according to claim 5 ; and a board formed with a through hole, the press-fit portion of the press-fit terminal being press-fit into the through hole, and a radius of curvature of the outward facing part of the parallel portion being equal to or smaller than an inner circumference radius of the through hole when viewed along the inserting direction.

Assignees

• Autonetworks Technologies Ltd
• Sumitomo Wiring Systems
• Sumitomo Electric Industries

Inventors

• Yamanaka Takuya
• Ito Tetsuya
• Furutani Mitsugu
• Shinozaki Tetsuya
• Tonosaki Takashi
• Tanaka Hiroyuki

Classifications

• H01R13/15

  Pins, blades or sockets having separate spring member for producing or increasing contact pressure · CPC title

• H01R13/05

  Resilient pins or blades (carrying separate resilient parts H01R13/15) · CPC title

• H01R12/585 Primary

  Terminals having a press fit or a compliant portion and a shank passing through a hole in the printed circuit board · CPC title